RRB Junior Engineer Stage 1 Model Papers 1

Question : 30 of 100

Marks: +1, -0

The length of the common chord of two circles of radii 15 cm and 20 cm whose centres are 25 cm apart is (in cm):

Solution:

∵ 15 20 25
⇒ 3 : 4 : 5 and forming at ∆ or

1/2 20×15=1/2 25×x

12= x

chord

=2×12=24cm

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